Shared Flashcard Set

Details

Chapter 4 Vocabulary (BJU6)
Cells and Classification
57
Science
6th Grade
09/29/2010

Additional Science Flashcards

 


 

Cards

Term
organism
Definition
a complete living thing
Term
life span
Definition
the process of birth, growth, reproduction, and death for living things
Term
life cycle
Definition
the process of birth, growth, reproduction and death of a living thing; life span
Term
parents
Definition
organisms that reproduce themselves
Term
environment
Definition
a living things surroundings
Term
energy
Definition
the ability to do work
Term
cell
Definition
the smallest unit of a living organism
Term
cell theory
Definition
a theory that says that 1) all living things are made of cells and 2) the cell carries on the function of a living organism
Term
microscope
Definition
an instrument that uses lenses to magnify objects hundreds or thousands of times
Term
eyepiece
Definition
the part of the microscope that you look through.  It holds the ocular lens system. 
Term
body tube
Definition
the adjustable cylinder that connects the eyepiece and objectives
Term
adjustment knobs
Definition
move the eyepiece and the objective lens up and down to bring the image into focus
Term
nosepiece
Definition
the rotating disc that holds the objective lenses of different magnifications
Term
arm
Definition
the curved part of the microscope that connects the lenses to the base
Term
objectives
Definition
lenses that are used to magnify the image of the specimen
Term
clips
Definition
these hold the slide in place on the stage
Term
stage
Definition
the place where the specimen (slide) is placed for viewing
Term
light source
Definition
focuses light to shine through the hole in the stage
Term
base
Definition
the bottom of the microscope; supports the microscope
Term
unicellular
Definition
an organism consisting of only one cell
Term
multicellular
Definition
living things made up of many cells
Term
tissue
Definition
a group of cells working together
Term
organ
Definition
two or more tissues that work together to perform a specific function
Term
system
Definition
organs working together
Term
cell membrane
Definition
a cell's external boundary for the material inside the cell
Term
cytoplasm
Definition
a jellylike substance made mostly of water and containing many substances, such as proteins and fats, that are essential to the cell.
Term
organelles
Definition
a tiny structure inside the cytoplasm of most cells that helps carry out the function of the cell
Term
nucleus
Definition
a large organelle that contains the chromosomes
Term
chromosomes
Definition
tight bundles of DNA; usually found in the nucleus of a cell
Term
mitochondria
Definition
the cell's engine; responsible for breaking down the cell's food and releasing energy
Term
endoplasmic reticulum
Definition
the cell's system of passageways that allows material to move from one part of the cell to another; also called ER
Term
ribosomes
Definition
make the proteins that the cell needs; they also carry out the instructions given to the cell by the DNA
Term
vacuoles
Definition
a bubble-like organelle in cells; generally used for storage
Term
cell wall
Definition
a rigid structure that provides support for some kinds of cells
Term
chloroplasts
Definition
organelles that contain chlorophyll; organelles in which photosynthesis takes place
Term
chlorophyll
Definition
a green pigment that absorbs energy from sunlight and uses it to produce food and energy for the plant
Term
cytologist
Definition
a scientist whose specialty is the study of cells
Term
cell division
Definition
the reproduction of an individual cell by its dividing into two cells
Term
mitosis
Definition
the step-by-step process that ensures that the two new cells formed by cell division will be the same as the original cell
Term
sexual reproduction
Definition
the process of creating new life using cells from male and female organisms 
Term
meiosis
Definition
a process of cell division in which cells divide a second time, producing reproductive cells with only half as many chromosomes as the parent cell
Term
criteria
Definition
standards for clasifying
Term
classification
Definition
putting organisms into groups based on similar characteristics
Term
bacteria
Definition
organisms in the kingdom eubacteria; the smallest living things known
Term
colonies
Definition
a group of the same kind of organisms living together; examples include bacteria and fungi
Term
protozoan
Definition
the more animal-like organisms in the kingdom Protista; able to move around and often live in water
Term
paramecium
Definition
a common protozoan that uses cilia to propel it through the water
Term
cilia
Definition
tiny hairlike structures
Term
amoebas
Definition
protozoans that move around by constantly changing their cell shapes
Term
algae
Definition
plantlike organisms in Kingdom Protista; usually can perform photosynthesis and are not mobile
Term
leaven
Definition
yeast mentioned in the Bible
Term
photosynthesis
Definition
a process that forms sugars from carbon dioxide and water using sunlight
Term
common name
Definition
a widely recognized name
Term
7 levels of classification
Definition

1) Kingdom

2) Phylum

3) Class

4) Order

5) Family

6) Genus

7) Species

Term
kingdom
Definition
every living thing falls into one of the kingdoms
Term
specific names
Definition
made up of 2 names - the first is the genus name and the second is the species name; in Latin
Term
Linnaen classification
Definition

an ordering system to help classify plants and animals according to common characterisitics; developed by Carolus Linnaeus


Supporting users have an ad free experience!